CN105895305A - Coil component - Google Patents
Coil component Download PDFInfo
- Publication number
- CN105895305A CN105895305A CN201610068925.9A CN201610068925A CN105895305A CN 105895305 A CN105895305 A CN 105895305A CN 201610068925 A CN201610068925 A CN 201610068925A CN 105895305 A CN105895305 A CN 105895305A
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- CN
- China
- Prior art keywords
- coil component
- connecting portion
- metal terminal
- joint elements
- wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 105
- 239000002184 metal Substances 0.000 claims abstract description 105
- 229910000679 solder Inorganic materials 0.000 claims abstract description 53
- 238000004804 winding Methods 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 34
- 230000000630 rising effect Effects 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 229910020935 Sn-Sb Inorganic materials 0.000 claims description 4
- 229910008757 Sn—Sb Inorganic materials 0.000 claims description 4
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 210000002683 foot Anatomy 0.000 description 40
- 239000000203 mixture Substances 0.000 description 14
- 239000011347 resin Substances 0.000 description 13
- 229920005989 resin Polymers 0.000 description 13
- 239000000463 material Substances 0.000 description 12
- 230000035939 shock Effects 0.000 description 8
- 238000005452 bending Methods 0.000 description 7
- 230000004087 circulation Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000001351 cycling effect Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 208000019901 Anxiety disease Diseases 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910018605 Ni—Zn Inorganic materials 0.000 description 2
- 230000036506 anxiety Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229910003962 NiZn Inorganic materials 0.000 description 1
- 229910020816 Sn Pb Inorganic materials 0.000 description 1
- 229910020922 Sn-Pb Inorganic materials 0.000 description 1
- 229910008783 Sn—Pb Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
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- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/045—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F2017/0093—Common mode choke coil
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Coils Of Transformers For General Uses (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The present invention provides a coil component for preventing a positional shift of a metal terminal with respect to a core. The coil component has a core body having a winding core portion (13) and a flange portion (11, 12) disposed on each of both ends of the winding core portion (13), the flange portion including a foot portion (111, 121); a wire (21, 22 ) wound around the winding core portion (13); an electrode portion (30) disposed on a bottom surface (111a, 121a ) of the foot portion (111) of the flange portion (11, 12) and connected to the wire (21, 22); a metal terminal (51) to be connected via a mounting solder (7) to a mounting substrate (S); and a joining component (6) connecting the metal terminal (51, 52) to the electrode portion (30). The joining component (6) has a heat resistance property retaining a connection state between the electrode portion (30) and the metal terminal (51, 52) at least at the melting point of the mounting solder (7).
Description
Technical field
The present invention relates to coil component.
Background technology
In the past, as having the electronic unit of metal terminal, there is a kind of Japanese Patent No. 4862900
Electronic unit number described in (patent documentation 1).This electronic unit is to have the multiple electricity of stacking to be situated between
The ferritic of matter layer, the terminal electrode formed in the way of covering the end face of ferritic and be arranged at
The cascade capacitor of the metal terminal of the surrounding of ferritic.Metal terminal is by solder with terminal electrode even
Connect.
Patent documentation 1: Japanese Patent No. 4862900
, in Japanese Patent No. 4862900, when utilizing solder, electronic unit is refluxed
(reflow) when being installed on installation base plate, if what the connection of metal terminal and terminal electrode was used
The fusing point of the solder that the fusing point of solder is used than the connection of metal terminal and installation base plate low or
Identical, then when backflow is installed, the solder that metal terminal and terminal electrode connect likely is melted.
Thus, metal terminal significantly deviates from ferritic or rotates, and there is the electricity of metal terminal and terminal electrode
Connection reliability reduces, the size of electronic unit becomes not to be accommodated in the anxiety of the scope of regulation.
Summary of the invention
In consideration of it, the problem of the present invention is, it is provided that one prevents metal terminal relative to core body
(core) coil component of position skew.
In order to solve above-mentioned problem, the coil component of the present invention is characterised by possessing:
Core body, this core body has core and the foot of the two ends setting being included in above-mentioned core
Blade of a sword portion；
Wire, this wire is wound in above-mentioned core；
Electrode portion, the above-mentioned wire that the bottom surface of this electrode portion and the above-mentioned foot in above-mentioned blade of a sword portion is arranged
Connect；
Metal terminal, this metal terminal is for being connected with installation base plate via installation solder；And
Joint elements, above-mentioned metal terminal is connected by these joint elements with above-mentioned electrode portion；
Above-mentioned joint elements have the above-mentioned electrode portion that at least keeps under the fusing point of above-mentioned installation solder
Thermostability with the connection status of above-mentioned metal terminal.
According to the coil component of the present invention, owing to joint elements have at least at the fusing point installing solder
The thermostability of the connection status of lower holding electrode portion and metal terminal, so joint elements such as have
The fusing point higher than installing solder.Therefore, backflow is being utilized to be connected with installation base plate by metal terminal
In the case of, even if solder is installed in fusing under the fusing point installing solder, joint elements also become to be difficult to
Fusing.Therefore, it is possible to prevent the metal terminal when backflow from offseting relative to the position of core body.
Preferably in the coil component of an embodiment, it is provided with in the side of above-mentioned foot and cuts
Mouthful, it is embedded with above-mentioned joint elements at above-mentioned otch.
According to the coil component of above-mentioned embodiment, owing to being provided with otch in the side of foot, and
Being embedded with joint elements at otch, so joint elements are also connected with blade of a sword portion, joint elements are for warm
The patience of impact cycle improves.
Preferably in the coil component of an embodiment, above-mentioned metal terminal has: with above-mentioned electricity
The first connecting portion that pole portion connects, for the second connecting portion of being connected with above-mentioned installation base plate and
In the way of above-mentioned first connecting portion and above-mentioned second connecting portion have difference of height by above-mentioned first even
Connect portion and the linking part of above-mentioned second connecting portion link.
According to the coil component of above-mentioned embodiment, the first connecting portion being connected with electrode portion and being used for
It is concatenated in the way of there is difference of height with the second connecting portion that installation base plate is connected.Thus, in profit
In the case of the second connecting portion being connected with installation base plate with installation solder, reduce and connect by first
The installation weldering that the joint elements that portion and electrode portion connect are connected with by the second connecting portion and installation base plate
The situation of material mixing, prevents the fusing point of joint elements from declining.
Preferably in the coil component of an embodiment, above-mentioned first connecting portion of above-mentioned linking part
The end of side is positioned at the underface of the bottom surface of above-mentioned foot.
According to the coil component of above-mentioned embodiment, due to the end of the first connecting portion side of linking part
Be positioned at the underface of the bottom surface of foot, so the end of linking part is connected with the bottom surface of foot, when to
When coil component is applied with the load of horizontal direction, for this load centered by the second connecting portion
The moment of power diminish, metal terminal is difficult to bend.
Preferably in the coil component of an embodiment, above-mentioned second connecting portion be provided with for
Rising portions for above-mentioned installation solder connection.
According to the coil component of above-mentioned embodiment, owing to being provided with for for peace at the second connecting portion
The rising portions of dress solder connection, so the leg installing solder erects, it is possible to pass through AOI
(Automatic Optical Inspection machine: apparatus for substrate appearance inspection) etc. confirm
Connection with installation base plate.
Preferably in the coil component of an embodiment, above-mentioned metal terminal is not at above-mentioned leading
The underface of the winding part being wound in above-mentioned core of line.
According to the coil component of above-mentioned embodiment, owing to metal terminal is not at being rolled up of wire
It is around in the underface of the winding part of core, so when resinous coat is formed at coil component
Time, between the winding part and metal terminal of wire, do not accumulate resin.That is, resin will not
The winding part of wire and metal terminal one connect.Thus, resin not by the expansion of metal terminal,
Contraction pulls, and is not affected by the stress produced because of the expansion of metal end, contraction.As a result, wire is not
Can be expanded by because of metal terminal via resin, be shunk produced stress.Therefore, it is possible to
Prevent the broken string of the wire caused based on heat shock cycling.
Preferably in the coil component of an embodiment, above-mentioned metal terminal is warp by thermo-compressed
It is connected with electrode portion by joint elements.
According to the coil component of above-mentioned embodiment, due to metal terminal by thermo-compressed via connecing
Close parts to be connected with electrode portion, it is possible to metal terminal and electrode portion are engaged with the short time, can
The generation of the intermetallic compound of the reason as cracking of suppression joint elements.
Preferably in the coil component of an embodiment, above-mentioned joint elements are the welderings of Sn-Sb system
Material.
According to the coil component of above-mentioned embodiment, owing to joint elements are Sn-Sb system solders,
So the fusing point of joint elements is higher than installing solder.Therefore, it is possible to metal terminal phase during anti-backflow
The position of core body is offset.
Preferably in the coil component of an embodiment, above-mentioned joint elements are Bi system solders.
According to the coil component of above-mentioned embodiment, owing to joint elements are Bi system solders, so connecing
The Young's modulus and the linear expansion coefficient that close parts are relatively low.Therefore, the resistance to sudden heating of joint elements
Improve.
Preferably in the coil component of an embodiment, above-mentioned joint elements are that electric conductivity is bonding
Agent.
According to the coil component of above-mentioned embodiment, owing to joint elements are conductive adhesives, institute
The situation melted because of backflow to be prevented from joint elements.
According to the coil component of the present invention, owing to joint elements have at least at the fusing point installing solder
The thermostability of the connection status of lower holding electrode portion and metal terminal, it is possible to prevent metal terminal
Offset relative to the position of core body.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of the coil component of the first embodiment representing the present invention.
Fig. 2 is the exploded perspective view of coil component.
Fig. 3 is the side view that the X-direction from coil component is observed.
Fig. 4 is the side view that the Y-direction from coil component is observed.
Fig. 5 is the upward view of coil component.
Fig. 6 is the observing from bottom surface side of coil component representing second embodiment of the present invention
Axonometric chart.
Fig. 7 is the observing from bottom surface side of coil component representing third embodiment of the present invention
Axonometric chart.
Fig. 8 installs the longevity of solder when representing and give thermal shock to embodiments of the invention with conventional example
The chart of life.
Detailed description of the invention
Hereinafter, by embodiment illustrated, the present invention is described in detail.
(the first embodiment)
Fig. 1 is the axonometric chart of the coil component of the first embodiment representing the present invention.Fig. 2 is line
The exploded perspective view of coil component.As depicted in figs. 1 and 2, coil component 1 is common mode choke coil.
Coil component 1 has: core body 10, be wound in first and second wires (wire) of core body 10
21,22, be arranged at core body 10 electrode portion 30, for be connected with installation base plate S first and
Second metal terminal 51,52, the first and second metal terminals 51,52 are connected with electrode portion 30
Joint elements 6 and be arranged at the plate member 15 of core body 10.
Core body 10 has: core 13, first blade of a sword arranged in axial one end of core 13
Portion 11 and the second blade of a sword portion 12 of the axial other end setting at core 13.As core body 10
Material, for example with aluminium oxide (nonmagnetic material), Ni-Zn based ferrite (magnetic, absolutely
Edge body), the dielectric constant such as resin be the material of less than 20.
The bottom surface of core body 10 is set to be installed in the face of installation base plate S, by the end face of core body 10
It is set to the face of opposition side, bottom surface with core body 10.One end of core 13 and the other end are linked
Direction (direction of principal axis) is set to X-direction, by the direction orthogonal with X-direction in the bottom surface of core body 10
It is set to Y-direction, the direction that bottom surface and the end face of core body 10 link is set to Z-direction.Z-direction
Orthogonal with X-direction and Y-direction.X-direction is the length direction of coil component 1, Y-direction
Being the width of coil component 1, Z-direction is the short transverse of coil component 1.
Core 13 axially extends towards the other end from its one end.The shape of core 13 is rectangular
Body.Additionally, the shape of core 13 can also be other shapes such as cylinder.
The end face 11a in the first blade of a sword portion 11 is connected with one end of core 13.First blade of a sword portion 11 is at core
The bottom surface side of body 10 has two foots 111.Two foot 111 skies in the Y direction open spatial arrangements.
The end face 12a in the second blade of a sword portion 12 is connected with the other end of core 13.Second blade of a sword portion 12
Bottom surface side at core body 10 has two foots 121.Two foot 121 skies in the Y direction open sky
Between arrange.
One foot 111 in the first blade of a sword portion 11 and a foot 121 in the second blade of a sword portion 12 are in X side
To opposed.Another foot 111 in the first blade of a sword portion 11 and another foot 121 in the second blade of a sword portion 12
Opposed in X-direction.
Plate member 15 is installed in end face 11b and the end face in the second blade of a sword portion 12 in the first blade of a sword portion 11
12b.Plate member 15 is identical with the material of core body 10.Core body 10 constitutes with plate member 15 and closes
Close magnetic circuit.
Electrode portion 30 is arranged on two foots 111 in the first blade of a sword portion 11 and the second blade of a sword portion 12
Two foots 121.As the material in electrode portion 30, for example with Ag etc..
First and second wires 21,22 are wound onto core 13 with coiled type.First and second
Wire 21,22 is such as tightened simultaneously as lemniscate, this will be referred to as two-wire winding.First He
Second wire 21,22 such as has the tunicle of the conductors such as Cu, Ag, Au and coated conductor.
One end of first wire 21 is electrically connected with the electrode portion 30 of a foot 111 in the first blade of a sword portion 11
Connect, the other end of the first wire 21 and the electrode portion 30 of a foot 121 in the second blade of a sword portion 12
Electrical connection.
One end of second wire 22 is electric with the electrode portion 30 of another foot 111 in the first blade of a sword portion 11
Connect, the other end of the second wire 22 and the electrode portion of another foot 121 in the second blade of a sword portion 12
30 electrical connections.
First, second metal terminal 51,52 electrically connects with electrode portion 30 and installation base plate S, and
Electrode portion 30 and installation base plate S are turned on.First, second metal terminal 51,52 such as passes through
The sheet metal bent such as Cu, Ag, Au are constituted.The first metal end 51 and the second metal end
Son 52 is formed symmetrical.
The first metal end 51 and the foot 111 in the first blade of a sword portion 11 and the second blade of a sword portion 12
Another foot 121 connects respectively.Another foot in the second metal terminal 52 and the first blade of a sword portion 11
One foot 121 in portion 111 and the second blade of a sword portion 12 connects respectively.
First, second metal terminal 51,52 is via the electrode installing solder 7 and installation base plate S
Electrical connection.Installing solder 7 is solder, e.g. Sn-Pb system solder.Solder 7 is installed
Fusing point lower than 220 DEG C.
First, second metal terminal 51,52 electrically connects with electrode portion 30 via joint elements 6.
Joint elements 6 are high-temperature solders, have the fusing point higher than the fusing point installing solder 7.Joint elements
The fusing point of 6 is higher than 220 DEG C.
In a word, as the feature of coil component 1, joint elements 6 have at least is installing solder 7
Fusing point under holding electrode portion 30 and the connection status of first, second metal terminal 51,52 resistance to
Hot.Connection status is kept to refer to holding electrode portion 30 and first, second metal terminal 51,52
Relative position.
According to above-mentioned coil component 1, utilize backflow by first, second metal terminal 51,52 with
In the case of installation base plate S connects, melt even if installing solder 7 under the fusing point installing solder 7,
Joint elements 6 are also difficult to melt.Therefore, it is possible to prevent first, second metal terminal when backflow
51,52 offset relative to the position of core body 10.
Joint elements 6 e.g. Sn-Sb system solder.Thus, the fusing point of joint elements 6 is than peace
The fusing point of welding equipment material 7 is high.Therefore, it is possible to be reliably prevented first, second metal terminal further
51, the position skew of 52.
Joint elements 6 can also be Bi system solder.Thus, joint elements 6 Young's modulus and
Linear expansion coefficient is relatively low.Therefore, the resistance to sudden heating of joint elements 6 improves.
Joint elements 6 can also be conductive adhesive.Conductive adhesive e.g. comprise Ag,
The heat-curing resin of the metal packings such as Au, Cu.The sublimation point of conductive adhesive is than installing weldering
The fusing point of material 7 is high.Thereby, it is possible to prevent joint elements 6 from melting because of backflow.
Fig. 3 is the side view that the X-direction from coil component 1 is observed.Fig. 4 is from coil component
The side view that the Y-direction of 1 is observed.
As shown in Figure 2, Figure 3 and Figure 4, in the first blade of a sword portion 11, foot 111 has bottom surface 111a
With the side 111b outside Y-direction.Bottom surface 111a is provided with electrode portion 30.At side 111b
The otch 5 of 111a side, oriented bottom surface incised notch is set.It is embedded with joint elements 6 at otch 5.
Equally, in the second blade of a sword portion 12, foot 121 has bottom surface 121a and side 121b,
Bottom surface 121a is provided with electrode portion 30, and side 121b is provided with otch 5.Embed at otch 5
There are joint elements 6.
Accordingly, because be embedded with joint elements 6 at otch 5, thus joint elements 6 and first,
Second blade of a sword portion 11,12 also connects, and joint elements 6 improve for the patience of heat shock cycling.Heat
Impact cycle refers to reciprocal high temperature and the situation of low temperature at intervals of set time.
The first metal end 51 has: the first connecting portion 511 of being connected with electrode portion 30, be used for
The second connecting portion 512 of being connected with installation base plate S, with the first connecting portion 511 and the second connecting portion
The link that first connecting portion 511 and the second connecting portion 512 are linked by 512 modes with difference of height
Portion 513.
First connecting portion 511 is positioned at the position higher than the second connecting portion 512 in Z-direction.Second even
Meet portion 512 to be positioned in the Y direction than the first connecting portion 511 position in the inner part.Inner side refers to coil
The central side of parts 1 is the most identical.Linking part 513 extends along Y-direction, by the first connecting portion
The Y-direction end of second connecting portion 512 side of 511 and the first connecting portion of the second connecting portion 512
The Y-direction end of 511 sides links.
Equally, the second metal terminal 52 has first connecting portion the 521, second connecting portion 522 and connects
Knot 523.First connecting portion 521 is connected with electrode portion 30.Second connecting portion 522 and installation base
Plate S connects.Linking part 523 has difference of height with the first connecting portion 521 and the second connecting portion 522
Mode the first connecting portion 521 and the second connecting portion 522 are linked.
Accordingly, because first connecting portion the 511,521 and second connecting portion 512,522 is to have height
The mode of low difference is concatenated, so installing solder 7 by the second connecting portion 512,522 even utilizing
In the case of being connected to installation base plate S, reduce and the first connecting portion 511,521 and electrode portion 30 are connected
The installation weldering that the joint elements 6 connect are connected with by the second connecting portion 512,522 and installation base plate S
The situation of material 7 mixing, prevents the fusing point of joint elements 6 from declining.
First, second metal terminal 51,52 by thermo-compressed via joint elements 6 and electrode
Portion 30 connects.Such as, in the first metal end 51, upper at the first connecting portion 511 in advance
Surface-coated joint elements 6, make the joint elements 6 of the upper surface of the first connecting portion 511 be contacted with
Electrode portion 30, is attached to the lower surface of the first connecting portion 511 by heated heating chip.Thus,
Joint elements 6 melt, and the first connecting portion 511 is connected with electrode portion 30 via joint elements 6.
Wherein, in the second metal terminal 52, it is attached the most in the same way.
Accordingly, because first, second metal terminal 51,52 by thermo-compressed via junction surface
Part 6 is connected with electrode portion 30, it is possible to the short time by first, second metal terminal 51,
52 engage with electrode portion 30, can suppress to change between the metal as the reason of cracking of joint elements 6
The generation of compound.On the other hand, in the case of utilizing backflow to be engaged with electrode portion by metal terminal,
Owing to heat time heating time is elongated, generating intermetallic compound in a large number so existing, occurring at joint elements
The anxiety of cracking.
As it is shown on figure 3, in the first side, blade of a sword portion 11, the linking part 513 of the first metal end 51
The end of the first connecting portion 511 side is positioned at the underface of the bottom surface 111a of foot 111.It addition, the
The end of the first connecting portion 521 side of the linking part 523 of two metal terminals 52 is positioned at foot 111
The underface of bottom surface 111a.Wherein, owing to being also same composition in the second side, blade of a sword portion 12,
So omitting the description.
Therefore, in the first metal end 51, the end of linking part 513 and the bottom surface of foot 111
111a connect, when being applied with the load of horizontal direction to coil component 1, for this load with
The moment of the power centered by the second connecting portion 512 diminishes, and the first metal end 51 becomes to be difficult to curved
Bent.In the second metal terminal 52, also there is same effect.
As shown in Figure 4, in the first metal end 51, the second connecting portion 512 is provided with use
In for installing the rising portions 514 that solder 7 connects.Rising portions 514 erects towards the outside of X-direction.
Equally, in the second metal terminal 52, the second connecting portion 522 is provided with rising portions 524.
Therefore, it is connected with rising portions 514,524 by installation solder 7 so that solder 7 is installed
Leg erect, it is possible to by AOI (Automatic Optical Inspection machine:
Apparatus for substrate appearance inspection) etc. the connection of confirmation and installation base plate S.
Fig. 5 is the upward view of coil component 1.As it is shown in figure 5, the first metal end 51 not position
The winding part 21a being wound in core 13 and the second wire 22 in the first wire 21
The underface of the winding part 22a being wound in core 13.In Figure 5, two point is utilized
The encirclement of line represents winding part 21a, 22a.Equally, the second metal terminal 52 is not positioned at
The winding part 21a of one wire 21 and the underface of the winding part 22a of the second wire 22.
Therefore, when not shown resinous coat is formed at coil component 1, first, second
Between winding part 21a, 22a and first, second metal terminal 51,52 of wire 21,22
Do not accumulate resin.That is, resin is not by winding part 21a, 22a of first, second wire 21,22
It is connected with first, second metal terminal 51,52 one.Thus, resin is not by first, second
The expansion of metal terminal 51,52, shrink and pull, by because of first, second metal terminal 51,
Expansion, the contraction of 52 and the stress that produces.As a result, first, second wire 21,22 is (especially
It is the coupling part in electrode portion 30 with first, second wire 21,22) it is subject to not via resin
Arrive the expansion because of first, second metal terminal 51,52, shrink produced stress.Therefore,
It is prevented from the broken string of first, second wire 21,22 caused because of heat shock cycling.
(the second embodiment)
Fig. 6 is the observing from bottom surface side of coil component representing second embodiment of the present invention
Axonometric chart.Second embodiment and the first embodiment difference are only that first, second metal end
The composition of son.The composition of this difference is below only described.
As shown in Figure 6, the sub-51A of the first metal end has: first be connected with electrode portion 30 is even
Meet portion 511, for the second connecting portion 512 being connected with installation base plate S, with the first connecting portion 511
With the mode that the second connecting portion 512 has difference of height by the first connecting portion 511 and the second connecting portion
512 linking parts 513 linked.Second connecting portion 512 is provided with rising portions 514.
First connecting portion the 511, second connecting portion 512 and rising portions 514 are and the first embodiment party
The composition that first connecting portion of formula, the second connecting portion and rising portions are same.Linking part 513 is towards X
Direction bending, by Y-direction medial end and the X of the second connecting portion 512 of the first connecting portion 511
Direction medial end links.The bending section 513a of linking part 513 is positioned at inside X-direction.
Equally, the second metal terminal 52A has: first connecting portion the 521, second connecting portion 522,
Comprise linking part 523 and the rising portions 524 of bending section 523a.
Therefore, in this second embodiment, there is the effect as the first embodiment.
(the 3rd embodiment)
Fig. 7 is the observing from bottom surface side of coil component representing third embodiment of the present invention
Axonometric chart.The difference of the 3rd embodiment and the first embodiment is only that first, second metal end
The composition of son.The composition of this difference is below only described.
As it is shown in fig. 7, the sub-51B of the first metal end has: first be connected with electrode portion 30 is even
Meet portion 511, for the second connecting portion 512 being connected with installation base plate S, with the first connecting portion 511
With the mode that the second connecting portion 512 has difference of height by the first connecting portion 511 and the second connecting portion
512 linking parts 513 linked.
First connecting portion 511 and the second connecting portion 512 are that first with the first embodiment is connected
Portion and the same composition of the second connecting portion.Linking part 513, towards X-direction bending, connects first
The Y-direction medial end in portion 511 and the X-direction outboard end of the second connecting portion 512 link.
The bending section 513a of linking part 513 is positioned at outside X-direction.It is real that bending section 513a also has first
Execute the function of the rising portions of mode.
Equally, the second metal terminal 52B have first connecting portion the 521, second connecting portion 522,
With the linking part 523 comprising bending section 523a.
Therefore, in the third embodiment, there is the effect as the first embodiment.It addition,
Compared with first, second metal terminal of the first embodiment, it is possible to omit rising portions, it is possible to decrease
The cost of parts.
Additionally, the present invention is not limited to above-mentioned embodiment, without departing from present subject matter
In the range of can design for change.For example, it is possible to by the first to the 3rd respective characteristic point of embodiment
Carry out various combination.
In the above-described embodiment, although using coil component as common mode choke coil, but as long as being
By Wire-wound in the coil component of core body, it is also possible to be the arbitrary coils such as pulse transformer
Parts.
In the above-described embodiment, it is provided with plate member but it also may omit plate member.Above-mentioned
In embodiment, it is provided with 2 wires but it also may be set to 1 or more than 3.
In the above-described embodiment, it is provided with 2 foots in 1 blade of a sword portion but it also may arrange 1
Individual or more than 3.
In the above-described embodiment, 2 metal terminals are set in 1 blade of a sword portion but it also may arrange
1 or more than 3.
In the above-described embodiment, electrode portion and joint elements are set to independent parts, but also may be used
Using by electrode portion and joint elements as same parts.
In the above-described embodiment, the otch of foot is arranged on the side outside the Y-direction of foot,
But can also be arranged on the side outside the X-direction of the side inside the Y-direction of foot, foot,
Side etc. inside the X-direction of foot.
In the above-described first embodiment, the fusing point with joint elements is higher than the fusing point installing solder
First composition, foot be provided with otch second composition, metal terminal have the first connecting portion,
3rd composition of the second connecting portion and linking part, the end of linking part are just being positioned at the bottom surface of foot
The 4th of lower section constitutes, is provided with at the second connecting portion the 5th composition and metal terminal of rising portions
It is not at all compositions of the 6th composition of the underface of the winding part of wire, but as long as at least
Have first to constitute, such as, can also constitute at least 1 constituted with second～the 6th by first
Individual composition is combined.
[embodiment]
Then, the embodiment of the coil component of first embodiment of the present invention is illustrated.
(material and preparation method)
Manufacture the common mode choke coil as coil component as follows.First, dip-coating is passed through
Ag thick film containing glass is coated on the H of the Ni-Zn based ferrite that relative permeability is 1000
The foot of core body, after having carried out firing with about 900 DEG C, according to plating on Ag thick film
Ni, the order of plating Sn are implemented electrolysis plating, thus are defined electrode portion.Then, by 2 tools
Copper cash and the wire of dielectric film being made up of the enamel covering copper cash is had to be wound in the number of turn of regulation
The core of core body, and the end hot pressing of each wire is connected to electrode portion.
Then, in the blade of a sword portion with opposition side, electrode portion of core body, bonding by dip-coating coating epoxy
Agent, and the plate member of the NiZn based ferrite of the relative permeability 1000 identical with core body of fitting with
Just closed magnetic circuit, pressing plate parts are while making bonding agent heat cure.
Then, in the position engaged with electrode portion of metal terminal, coat in decentralized manner by Sn
The joint elements that-10Sb solder is formed, carry in the face being coated with joint elements of metal terminal
The core body that coiling completes.And, from the opposing face in the face contacted with electrode portion of metal terminal, will
The heating chip being heated to about 350 DEG C is adjacent to about 1 second, makes joint elements melt, will
Core body is connected with metal terminal.So, common mode choke coil has been manufactured.
(the first experimental result)
Fig. 8 illustrate for embodiments of the invention and eliminate the constitutive requirements of embodiment
The conventional example of metal terminal, the peace during thermal shock of respectively impart 30 minutes-55 DEG C and 150 DEG C
The analog result in the life-span of welding equipment material.Represent embodiments of the invention with the curve of square, use rhombus
Curve represent conventional example.The longitudinal axis represents solder connection key element rate, and numerical value is the highest then installs solder
State is the best, and 5% becomes the threshold value installing solder breaks.Transverse axis represents heat shock cycling number,
By-55 DEG C with 150 DEG C be back and forth set to for 1 time 1 time circulation.
As shown in Figure 8, in the prior embodiment, solder is installed through 1695 circulation fractures.With this
Relatively, in an embodiment of the present invention, solder is installed through 6619 circulation fractures.Therefore,
By metal terminal being used Sn-10Sb solder connection as embodiments of the invention, significantly carry
High resistance to sudden heating.
(the second experimental result)
Otch for embodiments of the invention with the core body in the constitutive requirements eliminating embodiment
Conventional example, implement above-mentioned thermal shock test.As a result, in the prior embodiment, for 80
In 4, joint elements through 500 times circulation fracture.On the other hand, in the enforcement of the present invention
In example, for 130, implementing even across 2000 circulations, joint elements the most do not rupture.
Therefore, by otch being arranged at core body as embodiments of the invention, it is greatly improved heat-resisting
Impact.
(the 3rd experimental result)
End for embodiments of the invention and the linking part of metal terminal is positioned at the foot from core body
The conventional example of the position of deviation under the bottom surface in portion, implements the examination from the load laterally loading 10N
Test.As a result, in the prior embodiment, coil component rotates because of load.On the other hand, in the present invention
Embodiment in, owing to the moment of the power of the linking part of metal terminal diminishes, even if so adding and load with
Lotus, coil component does not rotates.
(the 4th experimental result)
It is wound in volume for what the parts of embodiments of the invention and metal terminal was positioned at wire
The conventional example of the underface of the winding part of core, to coil component coated with resins and implement above-mentioned
The test of thermal shock.As a result, in the prior embodiment, resin accumulates in winding part and the metal of wire
Between terminal, observe the broken string of wire through 250 circulations.On the other hand, the present invention's
In embodiment, owing to resin does not accumulate between the winding part of wire and metal terminal, so
Even if being implemented into 1000 circulations, wire does not the most break.
Description of reference numerals
1-coil component；5-otch；6-joint elements；7-installs solder；10-core body；
11-first blade of a sword portion；111-foot；111a-bottom surface；111b-side；12-second blade of a sword portion；
121-foot；121a-bottom surface；121b-side；13-core；15-plate member；21
-the first wire；21a-winding part；22-the second wire；22a-winding part；30-electricity
Pole portion；51,51A, 51B-the first metal end；511-the first connecting portion；512-second
Connecting portion；513-linking part；514-rising portions；52,52A, 52B-second metal terminal；
521-the first connecting portion；522-the second connecting portion；523-linking part；524-rising portions；S
-installation base plate.
Claims (10)
1. a coil component, it is characterised in that possess:
Core body, this core body has core and the foot of the two ends setting being included in described core
Blade of a sword portion；
Wire, this wire is wound in described core；
Electrode portion, the described wire that the bottom surface of this electrode portion and the described foot in described blade of a sword portion is arranged
Connect；
Metal terminal, this metal terminal is for being connected with installation base plate via installation solder；And
Joint elements, described metal terminal is connected by these joint elements with described electrode portion,
Described joint elements have the described electrode portion that at least keeps under the fusing point of described installation solder
Thermostability with the connection status of described metal terminal.
Coil component the most according to claim 1, it is characterised in that
The side of described foot is provided with otch, is embedded with described joint elements at described otch.
Coil component the most according to claim 1 and 2, it is characterised in that
Described metal terminal have be connected with described electrode portion the first connecting portion, for described peace
Fill the second connecting portion of substrate connection and with described first connecting portion and described second connecting portion tool
There is the linking part that described first connecting portion and described second connecting portion are linked by the mode of difference of height.
Coil component the most according to claim 3, it is characterised in that
The end of the described first connecting portion side of described linking part is just being positioned at the bottom surface of described foot
Lower section.
5. according to the coil component described in claim 3 or 4, it is characterised in that
It is provided with for the rising portions for described installation solder connection at described second connecting portion.
Coil component the most as claimed in any of claims 1 to 5, it is characterised in that
Described metal terminal is not positioned at the winding part being wound in described core of described wire
Underface.
Coil component the most as claimed in any of claims 1 to 6, it is characterised in that
Described metal terminal is connected with electrode portion via joint elements by thermo-compressed.
Coil component the most as claimed in any of claims 1 to 7, it is characterised in that
Described joint elements are Sn-Sb system solders.
Coil component the most as claimed in any of claims 1 to 7, it is characterised in that
Described joint elements are Bi system solders.
Coil component the most as claimed in any of claims 1 to 7, it is characterised in that
Described joint elements are conductive adhesives.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015026741A JP6443104B2 (en) | 2015-02-13 | 2015-02-13 | Coil parts |
| JP2015-026741 | 2015-02-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105895305A true CN105895305A (en) | 2016-08-24 |
| CN105895305B CN105895305B (en) | 2019-05-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610068925.9A Active CN105895305B (en) | 2015-02-13 | 2016-02-01 | Coil component |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10347415B2 (en) |
| JP (1) | JP6443104B2 (en) |
| CN (1) | CN105895305B (en) |
| DE (1) | DE102016202049A1 (en) |
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| CN108573800A (en) * | 2017-03-07 | 2018-09-25 | 株式会社村田制作所 | Coil component |
| CN108933025A (en) * | 2017-05-23 | 2018-12-04 | 株式会社村田制作所 | Winding type coil component |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102016202049A1 (en) | 2016-08-18 |
| US10347415B2 (en) | 2019-07-09 |
| JP6443104B2 (en) | 2018-12-26 |
| CN105895305B (en) | 2019-05-21 |
| JP2016149498A (en) | 2016-08-18 |
| US20160240306A1 (en) | 2016-08-18 |
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